Depending on the stencil paints used, it wasn't always apparent if the fin or rear fuselage stencils were present on MC.200s, for example 10-95, a Breda built machine, the plane appears to be missing its stencils but if you examine the photo closely (expand the image or see ADI 8 p.26), on the fin you can see traces of the stencil MC.200 in Azzurro (blue):
372-2 (Breda) and 95-14 (Ambrosini), again the fin stencils are difficult to observe but are present in Azzurro.
In other cases the stencils are clearly visible like 356-18 (Ambrosini) where yellow was used for stenciling against a dark green background or black on NC4 for 5-357 (Breda) on the fin, and white stencils on the fin and rear fuselage of CB 93-3 (Macchi). Also note that on 356-18 the stencils ("C.200") on the rear fuselage appear to have been painted over the unit number 356:
For 364-7 the stencils don’t appear present on either the fin or rear fuselage but it doesn’t mean the stencils weren’t there in Azzurro although I don't think anyone can fault you for leaving them off as the instructions suggest. The inscriptions on the oiler filler hatch and external starter motor jack were etched onto the hatches and the external power jack, main and rear wheel tire pressure indicators were plates sometimes painted over but still clearly legible and as a side note, later on the C.205V the rear tire press indicators were sometimes stenciled in white instead of a plate inscription.